diff --git a/src/services/storage/db/storageInterface.ts b/src/services/storage/db/storageInterface.ts
index a7a04f78..94a52fb0 100644
--- a/src/services/storage/db/storageInterface.ts
+++ b/src/services/storage/db/storageInterface.ts
@@ -1,4 +1,4 @@
-import { fork } from 'child_process';
+import { ChildProcess, fork } from 'child_process';
 import { EventEmitter } from 'events';
 import { DbSettings, MainDbNames } from './db.js';
 import { DeepPartial, FindOptionsWhere } from 'typeorm';
@@ -19,7 +19,7 @@ import { serializeRequest, WhereCondition } from './serializationHelpers.js';
 export type TX<T> = (txId: string) => Promise<T>
 
 export class StorageInterface extends EventEmitter {
-    private process: any;
+    private process: ChildProcess;
     private isConnected: boolean = false;
     private debug: boolean = false;
 
diff --git a/src/services/storage/tlv/tlvFilesStorage.ts b/src/services/storage/tlv/tlvFilesStorage.ts
index 801fcc40..22b93e14 100644
--- a/src/services/storage/tlv/tlvFilesStorage.ts
+++ b/src/services/storage/tlv/tlvFilesStorage.ts
@@ -27,7 +27,7 @@ export class TlvFilesStorage {
 
     LoadFile = (app: string, dataName: string, chunk: number): TlvFile => {
         if (!this.metaReady || !this.meta[app] || !this.meta[app][dataName] || !this.meta[app][dataName].chunks.includes(chunk)) {
-            throw new Error("metrics not found")
+            throw new Error(`tlv file for ${app} ${dataName} chunk ${chunk} not found`)
         }
         const fullPath = [this.storagePath, app, dataName, `${chunk}.mtlv`].filter(s => !!s).join("/")
         const fileData = fs.readFileSync(fullPath)
diff --git a/src/services/storage/tlv/tlvFilesStorageFactory.ts b/src/services/storage/tlv/tlvFilesStorageFactory.ts
index 810996a9..edf48bb3 100644
--- a/src/services/storage/tlv/tlvFilesStorageFactory.ts
+++ b/src/services/storage/tlv/tlvFilesStorageFactory.ts
@@ -1,4 +1,4 @@
-import { fork } from 'child_process';
+import { ChildProcess, fork } from 'child_process';
 import { EventEmitter } from 'events';
 import { AddTlvOperation, ITlvStorageOperation, LoadLatestTlvOperation, LoadTlvFileOperation, NewTlvStorageOperation, TlvOperationResponse, TlvStorageSettings } from './tlvFilesStorageProcessor';
 import { LatestData, TlvFile } from './tlvFilesStorage';
@@ -10,7 +10,7 @@ export type TlvStorageInterface = {
 }
 
 export class TlvStorageFactory extends EventEmitter {
-    private process: any;
+    private process: ChildProcess;
     private isConnected: boolean = false;
     private debug: boolean = false;